You need to do more verticals. A lot of the compositions are weak, due to the camera being held horizontally on subjects that are standing, and which are much taller than they are wide. Particularly weak compositions are the man and woman ones where the camera is held horizontally, and they have huge amounts of empty space off to the side. On many of the child portraits, you've cut the hands off,and that looks disconcerting. I would study up on the topics of vertical composition, and horizontal composition, and develop an understanding of when one style is clearly more appropriate than the other.